I saw several posts similar to my problem. I am suddenly unable to boot windows on my windows 7 PC.
In safe mode it goes until aswRvrt.sys and then restarts.
I don t wich procedure I should follow.
Insert the USB into the sick computer and start the computer. First ensuring that the system is set to boot from USB
Note: If you are not sure how to do that follow the instructions Here
Windows 7 and Vista screenshots
When you reboot you will see this. Click repair my computer
notepad and press Enter.
The notepad opens. Under File menu select Open.
Select “Computer” and find your flash drive letter and close the notepad.
In the command window type e:\frst64.exe or e:\frst.exe dependant on system
and press Enter Note: Replace letter e with the drive letter of your flash drive.
The tool will start to run.
When the tool opens click Yes to disclaimer.